DSA · Theory

Application of Linked List

Theory

187/810

Application of Linked List

If you can teach Application of Linked List using a ticket queue node, you know it. If you only know the heading, you don’t.

Keep Application of Linked List small. Asha should finish a ticket queue node in a few lines, not a 40-line dump.

Without Application of Linked List, a counter gets messy and a ticket queue node is hard to trust.

Application of Linked List shows up in a counter. Name a ticket queue node, not “a real-world scenario”.

Don’t do this with Application of Linked List: losing the next pointer on delete. Interviewers spot it in ten seconds.

After Application of Linked List, Asha should still remember losing the next pointer on delete.

Close Application of Linked List with: “If I skip it, a ticket queue node goes wrong like this: losing the next pointer on delete.”

Diagram

  [10] → [20] → [30] → /
   head              tail

Exam tip

Say Application of Linked List in one breath, then head → next → …, then losing the next pointer on delete.

Example

class Node:
    def __init__(self, val, next=None):
        self.val = val
        self.next = next

head = Node(1, Node(2, Node(3)))
cur = head
while cur:
    print(cur.val, end=" -> " if cur.next else "\n")
    cur = cur.next

Application of Linked List — a linked list chains nodes with next pointers instead of contiguous indexes.

Short notes

DefApplication of Linked List — Asha uses it for a ticket queue node in a counter.
RuleApplication of Linked List → head → next → ….
RememberApplication of Linked List + time vs memory (a counter).
UseApplication of Linked List in a counter (a ticket queue node).
TrapApplication of Linked List — losing the next pointer on delete.
ExApplication of Linked List → a ticket queue node.

class Node: def __init__(self, val, next=None): self.val = val self.next = next head = Node(1, Node(2, Node(3))) cur = head while cur: print(cur.val, end=" -> " if cur.next else "\n") cur = cur.next

Application of Linked List

Example

Short notes

Questions

Application of Linked List

Example

Short notes

Questions